Gunasekera or Gunasekara is a Sinhalese surname. Notable people with the surname include:

• Abraham Mendis Gunasekera (1869–1931), Ceylonese writer
• Basil Gunasekara (born 1929), Sri Lankan navy officer
• C. I. Gunasekera (1920–2010), Sri Lankan cricketer
• Churchill Gunasekara (1894–1969), Ceylonese cricketer
• D. E. W. Gunasekera (born 1935), Sri Lankan politician
• Deepal Gunasekara, Sri Lankan politician
• Earl Gunasekara (born 1960), Sri Lankan politician
• Edward Gunasekara, Sri Lankan politician
• Frank Gunasekera, Ceylonese politician
• H. M. Gunasekera, Sri Lankan broadcaster
• Hemal Gunasekara (born 1959), Sri Lankan politician
• Kapila Gunasekara, Sri Lankan academic
• Maiya Gunasekara, Sri Lankan physician and rugby player
• Pasan Gunasekera (1964–1995), Sri Lankan soldier
• R. M. Padma Udhaya Shantha Gunasekera, Sri Lankan politician
• Romesh Gunesekera (born 1954), British author
• Ruvindu Gunasekera (born 1991), Sri Lankan cricketer
• Tudor Gunasekara (1935–2021), Sri Lankan politician and diplomat
• U. N. Gunasekera, Sri Lankan civil engineer
• Valentine Gunasekara (1931–2017), Sri Lankan architect
• Victor Gunasekara (1921–1993), Ceylonese civil servant
• Yohan Goonasekera (born 1957), Sri Lankan cricketer
• Thanujaya Gunasekara (born 1983), Business Development Consultant, Sales & Marketing Advisor

• Gunasekara - a spider genus with single species endemic to Sri Lanka.

• All pages with titles containing Goonasekera
• All pages with titles containing Gunasekara
• All pages with titles containing Gunasekera
• All pages with titles containing Gunesekera